refactor: remover todas as dependências do GitLab no workshop

- Aula 08: nginx-ingress TCP passthrough gitlab→gitea, comments
- Aula 09: add-client.sh API GitLab→Gitea
- Aula 11: node-bugado deployment image registry.kube.quest→gitea.kube.quest
- Aula 12: setup.sh/cleanup.sh API GitLab→Gitea, ArgoCD repoURL
- Aula 13: k8s manifests, benchmarks: registry.kube.quest→gitea.kube.quest,
           gitlab-registry→gitea-registry, GITLAB_TOKEN→GITEA_TOKEN
- Aula 14: comments GitLab→Gitea
- README raiz: arquitetura, tabela, DNS

aula-12/setup.sh

@@ -4,7 +4,7 @@
 # =============================================================================
 #
 # Este script instala Victoria Metrics stack usando ArgoCD (GitOps):
-#   1. Cria projeto 'factory/monitoring' no GitLab
+#   1. Cria projeto 'factory/monitoring' no Gitea
 #   2. Push dos manifests GitOps
 #   3. Cria ArgoCD Application
 #   4. Victoria Metrics + Grafana são sincronizados automaticamente
@@ -12,7 +12,7 @@
 # Pré-requisitos:
 #   - Cluster Kubernetes (aula-08)
 #   - ArgoCD instalado (aula-11)
-#   - GitLab com grupo 'factory' (aula-10/11)
+#   - Gitea com org 'factory' (aula-10/11)
 #
 # =============================================================================
 
@@ -117,15 +117,15 @@ echo "   Configuração Victoria Metrics (GitOps)"
 echo "=========================================="
 echo ""
 
-# GitLab Host
-if [[ -z "$GITLAB_HOST" ]]; then
-    read -p "Hostname do GitLab (ex: git.kube.quest): " GITLAB_HOST
+# Gitea Host
+if [[ -z "$GITEA_HOST" ]]; then
+    read -p "Hostname do Gitea (ex: gitea.kube.quest): " GITEA_HOST
 fi
-log_info "GitLab: https://${GITLAB_HOST}"
+log_info "Gitea: https://${GITEA_HOST}"
 
 # Extrair domínio base
 if [[ -z "$DOMAIN" ]]; then
-    DOMAIN=$(echo "$GITLAB_HOST" | sed 's/^[^.]*\.//')
+    DOMAIN=$(echo "$GITEA_HOST" | sed 's/^[^.]*\.//')
 fi
 
 # Grafana Host
@@ -136,14 +136,14 @@ if [[ -z "$GRAFANA_HOST" ]]; then
 fi
 log_info "Grafana: https://${GRAFANA_HOST}"
 
-# GitLab Token (para criar projeto via API)
-if [[ -z "$GITLAB_TOKEN" ]]; then
+# Gitea Token (para criar projeto via API)
+if [[ -z "$GITEA_TOKEN" ]]; then
     echo ""
-    echo "Token de acesso GitLab (para criar projeto via API):"
-    echo "  1. Acesse https://${GITLAB_HOST}/-/user_settings/personal_access_tokens"
-    echo "  2. Crie um token com scope 'api'"
+    echo "Token de acesso Gitea (para criar repositório via API):"
+    echo "  1. Acesse https://${GITEA_HOST}/user/settings/applications"
+    echo "  2. Crie um token com permissões de escrita"
     echo ""
-    read -p "GitLab Token: " GITLAB_TOKEN
+    read -p "Gitea Token: " GITEA_TOKEN
 fi
 
 # TLS (herdar da aula-11)
@@ -166,72 +166,73 @@ fi
 cat > "$ENV_FILE" << EOF
 # Configuração gerada pelo setup.sh
 # $(date)
-GITLAB_HOST=${GITLAB_HOST}
+GITEA_HOST=${GITEA_HOST}
 GRAFANA_HOST=${GRAFANA_HOST}
 DOMAIN=${DOMAIN}
 USE_CLOUDFLARE=${USE_CLOUDFLARE}
 USE_LETSENCRYPT=${USE_LETSENCRYPT}
-GITLAB_TOKEN=${GITLAB_TOKEN}
+GITEA_TOKEN=${GITEA_TOKEN}
 EOF
 
 log_success "Configuração salva em ${ENV_FILE}"
 
 # =============================================================================
-# CRIAR PROJETO NO GITLAB (VIA API)
+# CRIAR REPOSITÓRIO NO GITEA (VIA API)
 # =============================================================================
 
 echo ""
-log_info "=== Criando Projeto no GitLab ==="
+log_info "=== Criando Repositório no Gitea ==="
 
-# Verificar se grupo factory existe
-log_info "Verificando grupo 'factory'..."
-GROUP_RESPONSE=$(curl -s --header "PRIVATE-TOKEN: ${GITLAB_TOKEN}" \
-    "https://${GITLAB_HOST}/api/v4/groups?search=factory")
+# Verificar se org factory existe
+log_info "Verificando organização 'factory'..."
+ORG_RESPONSE=$(curl -s -o /dev/null -w "%{http_code}" \
+    -H "Authorization: token ${GITEA_TOKEN}" \
+    "https://${GITEA_HOST}/api/v1/orgs/factory")
 
-GROUP_ID=$(echo "$GROUP_RESPONSE" | grep -o '"id":[0-9]*' | head -1 | cut -d: -f2)
+if [[ "$ORG_RESPONSE" != "200" ]]; then
+    log_info "Criando organização 'factory'..."
+    ORG_CREATE=$(curl -s --request POST \
+        -H "Authorization: token ${GITEA_TOKEN}" \
+        -H "Content-Type: application/json" \
+        --data '{"username": "factory", "visibility": "limited"}' \
+        "https://${GITEA_HOST}/api/v1/orgs")
 
-if [[ -z "$GROUP_ID" ]]; then
-    log_info "Criando grupo 'factory'..."
-    GROUP_CREATE=$(curl -s --request POST --header "PRIVATE-TOKEN: ${GITLAB_TOKEN}" \
-        --header "Content-Type: application/json" \
-        --data '{"name": "factory", "path": "factory", "visibility": "internal"}' \
-        "https://${GITLAB_HOST}/api/v4/groups")
-    GROUP_ID=$(echo "$GROUP_CREATE" | grep -o '"id":[0-9]*' | head -1 | cut -d: -f2)
+    ORG_NAME=$(echo "$ORG_CREATE" | grep -o '"username":"factory"' || true)
 
-    if [[ -z "$GROUP_ID" ]]; then
-        log_error "Falha ao criar grupo 'factory'"
-        log_info "Crie manualmente em https://${GITLAB_HOST}/admin/groups/new"
+    if [[ -z "$ORG_NAME" ]]; then
+        log_error "Falha ao criar organização 'factory'"
+        echo "$ORG_CREATE"
         exit 1
     fi
-    log_success "Grupo 'factory' criado (ID: ${GROUP_ID})"
+    log_success "Organização 'factory' criada"
 else
-    log_success "Grupo 'factory' já existe (ID: ${GROUP_ID})"
+    log_success "Organização 'factory' já existe"
 fi
 
-# Verificar se projeto monitoring existe
-log_info "Verificando projeto 'monitoring'..."
-PROJECT_RESPONSE=$(curl -s --header "PRIVATE-TOKEN: ${GITLAB_TOKEN}" \
-    "https://${GITLAB_HOST}/api/v4/projects?search=monitoring")
+# Verificar se repositório monitoring existe
+log_info "Verificando repositório 'monitoring'..."
+REPO_RESPONSE=$(curl -s -o /dev/null -w "%{http_code}" \
+    -H "Authorization: token ${GITEA_TOKEN}" \
+    "https://${GITEA_HOST}/api/v1/repos/factory/monitoring")
 
-PROJECT_EXISTS=$(echo "$PROJECT_RESPONSE" | grep -o '"path_with_namespace":"factory/monitoring"' || true)
+if [[ "$REPO_RESPONSE" != "200" ]]; then
+    log_info "Criando repositório 'monitoring'..."
+    REPO_CREATE=$(curl -s --request POST \
+        -H "Authorization: token ${GITEA_TOKEN}" \
+        -H "Content-Type: application/json" \
+        --data '{"name": "monitoring", "private": false, "auto_init": false}' \
+        "https://${GITEA_HOST}/api/v1/orgs/factory/repos")
 
-if [[ -z "$PROJECT_EXISTS" ]]; then
-    log_info "Criando projeto 'monitoring'..."
-    PROJECT_CREATE=$(curl -s --request POST --header "PRIVATE-TOKEN: ${GITLAB_TOKEN}" \
-        --header "Content-Type: application/json" \
-        --data "{\"name\": \"monitoring\", \"namespace_id\": ${GROUP_ID}, \"visibility\": \"internal\", \"initialize_with_readme\": false}" \
-        "https://${GITLAB_HOST}/api/v4/projects")
+    REPO_NAME=$(echo "$REPO_CREATE" | grep -o '"name":"monitoring"' || true)
 
-    PROJECT_ID=$(echo "$PROJECT_CREATE" | grep -o '"id":[0-9]*' | head -1 | cut -d: -f2)
-
-    if [[ -z "$PROJECT_ID" ]]; then
-        log_error "Falha ao criar projeto 'monitoring'"
-        echo "$PROJECT_CREATE"
+    if [[ -z "$REPO_NAME" ]]; then
+        log_error "Falha ao criar repositório 'monitoring'"
+        echo "$REPO_CREATE"
         exit 1
     fi
-    log_success "Projeto 'monitoring' criado (ID: ${PROJECT_ID})"
+    log_success "Repositório 'monitoring' criado"
 else
-    log_success "Projeto 'monitoring' já existe"
+    log_success "Repositório 'monitoring' já existe"
 fi
 
 # =============================================================================
@@ -253,7 +254,8 @@ git config --global user.name "ArgoCD Setup" 2>/dev/null || true
 
 # Clone do repositório (usando token)
 log_info "Clonando repositório..."
-GIT_URL="https://oauth2:${GITLAB_TOKEN}@${GITLAB_HOST}/factory/monitoring.git"
+GITEA_USER=$(curl -s -H "Authorization: token ${GITEA_TOKEN}" "https://${GITEA_HOST}/api/v1/user" | grep -o '"login":"[^"]*"' | cut -d'"' -f4)
+GIT_URL="https://${GITEA_USER}:${GITEA_TOKEN}@${GITEA_HOST}/factory/monitoring.git"
 
 if ! git clone "${GIT_URL}" monitoring 2>/dev/null; then
     # Repositório vazio, inicializar
@@ -282,12 +284,12 @@ if git diff --cached --quiet; then
     log_info "Nenhuma mudança para commit"
 else
     git commit -m "feat: Victoria Metrics stack configuration"
-    log_info "Pushing para GitLab..."
+    log_info "Pushing para Gitea..."
     git push -u origin main 2>/dev/null || git push -u origin master 2>/dev/null || {
         # Primeiro push em repo vazio
         git push --set-upstream origin main 2>/dev/null || git push --set-upstream origin master
     }
-    log_success "Manifests enviados para GitLab"
+    log_success "Manifests enviados para Gitea"
 fi
 
 cd "${SCRIPT_DIR}"
@@ -321,9 +323,9 @@ metadata:
     argocd.argoproj.io/secret-type: repository
 stringData:
   type: git
-  url: https://${GITLAB_HOST}/factory/monitoring.git
-  username: oauth2
-  password: ${GITLAB_TOKEN}
+  url: https://${GITEA_HOST}/factory/monitoring.git
+  username: ${GITEA_USER}
+  password: ${GITEA_TOKEN}
 EOF
 
 log_success "Repositório configurado no ArgoCD"
@@ -353,7 +355,7 @@ metadata:
 spec:
   project: default
   source:
-    repoURL: https://${GITLAB_HOST}/factory/monitoring.git
+    repoURL: https://${GITEA_HOST}/factory/monitoring.git
     targetRevision: HEAD
     path: apps/victoria-metrics
     helm:
@@ -458,7 +460,7 @@ echo "Pods:"
 echo "  kubectl get pods -n monitoring"
 echo ""
 echo "GitOps Repository:"
-echo "  https://${GITLAB_HOST}/factory/monitoring"
+echo "  https://${GITEA_HOST}/factory/monitoring"
 echo ""
 echo "Verificar métricas:"
 echo "  kubectl port-forward -n monitoring svc/vmsingle-vm 8429:8429"