docs: Forgejo rootless on git.hacktivism.ch (no free signup)

configs/forgejo/compose.yml

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+# koopa-forgejo — ROOTLESS Forgejo image + rootless podman (user hernani)
+# Site: https://git.hacktivism.ch  |  HTTP :9024  |  SSH :2222
+services:
+  forgejo:
+    image: codeberg.org/forgejo/forgejo:11-rootless
+    container_name: koopa-forgejo
+    restart: unless-stopped
+    user: "1000:1000"
+    userns_mode: keep-id
+    env_file: [.env]
+    environment:
+      USER_UID: "1000"
+      USER_GID: "1000"
+      FORGEJO__database__DB_TYPE: postgres
+      FORGEJO__database__HOST: db:5432
+      FORGEJO__database__NAME: forgejo
+      FORGEJO__database__USER: forgejo
+      FORGEJO__database__PASSWD: ${FORGEJO_DB_PASSWORD}
+      FORGEJO__server__DOMAIN: git.hacktivism.ch
+      FORGEJO__server__SSH_DOMAIN: git.hacktivism.ch
+      FORGEJO__server__ROOT_URL: https://git.hacktivism.ch/
+      FORGEJO__server__HTTP_PORT: "3000"
+      FORGEJO__server__SSH_PORT: "2222"
+      FORGEJO__server__SSH_LISTEN_PORT: "2222"
+      FORGEJO__server__START_SSH_SERVER: "true"
+      FORGEJO__server__DISABLE_SSH: "false"
+      FORGEJO__server__LANDING_PAGE: explore
+      FORGEJO__service__DISABLE_REGISTRATION: "true"
+      FORGEJO__service__ALLOW_ONLY_EXTERNAL_REGISTRATION: "false"
+      FORGEJO__service__SHOW_REGISTRATION_BUTTON: "false"
+      FORGEJO__service__REQUIRE_SIGNIN_VIEW: "false"
+      FORGEJO__service__DEFAULT_ALLOW_CREATE_ORGANIZATION: "true"
+      FORGEJO__openid__ENABLE_OPENID_SIGNIN: "false"
+      FORGEJO__openid__ENABLE_OPENID_SIGNUP: "false"
+      FORGEJO__repository__DEFAULT_PRIVATE: public
+      FORGEJO__repository__ENABLE_PUSH_CREATE_USER: "true"
+      FORGEJO__repository__ENABLE_PUSH_CREATE_ORG: "true"
+      FORGEJO__security__INSTALL_LOCK: "true"
+      FORGEJO__session__PROVIDER: memory
+      FORGEJO__log__LEVEL: Info
+      FORGEJO____APP_NAME: "hacktivism git"
+    ports:
+      - "9024:3000"
+      - "2222:2222"
+    volumes:
+      - ./data:/var/lib/gitea
+      - ./config:/etc/gitea
+      - /etc/localtime:/etc/localtime:ro
+    depends_on:
+      db:
+        condition: service_healthy
+    labels:
+      org.hacktivism.service: forgejo
+      org.hacktivism.variant: rootless
+      org.hacktivism.host_port: "9024"
+      org.hacktivism.ssh_port: "2222"
+      org.hacktivism.site: git.hacktivism.ch
+      org.hacktivism.managed_by: koopa-admin
+    healthcheck:
+      test: ["CMD", "wget", "-q", "--spider", "http://127.0.0.1:3000/api/healthz"]
+      interval: 30s
+      timeout: 10s
+      retries: 10
+      start_period: 90s
+
+  db:
+    image: docker.io/library/postgres:16-alpine
+    container_name: koopa-forgejo-db
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: forgejo
+      POSTGRES_PASSWORD: ${FORGEJO_DB_PASSWORD}
+      POSTGRES_DB: forgejo
+    volumes:
+      - db-data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U forgejo -d forgejo"]
+      interval: 5s
+      timeout: 5s
+      retries: 20
+      start_period: 10s
+
+volumes:
+  db-data: