Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/web-app-pgadmin/vars/configuration.yml

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+version:                  "latest"
+server_mode:              False                             # If true then the preconfigured database file is loaded. Recommended False. True is a security risk.
+master_password_required: True                              # Master password is required. Recommended True. False is a security risk.
+oauth2_proxy:
+  application:            "application"
+  port:                   "80"
+features:
+  matomo:                 true
+  css:                    true
+  portfolio_iframe:       true
+  central_database:       true
+  oauth2:                 true
+csp:
+  flags:
+    style-src:
+      unsafe-inline: true
+    script-src-elem:
+      unsafe-inline: true
+  whitelist:
+    font-src:
+      - "data:"
+docker:
+  services:
+    database:
+      enabled: true

roles/web-app-pgadmin/vars/db_config.yml

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+pgadmin_host_server_file:     "{{docker_compose.directories.volumes}}servers.json"
+pgadmin_docker_server_file:   "/pgadmin4/servers.json"
+pgadmin_host_password_file:   "{{docker_compose.directories.volumes}}.pgpass"
+pgadmin_docker_password_file: "/pgpass"
+
+pgadmin_servers:
+  - name:           "Central Postgres Database"
+    host:           "{{ database_host }}"
+    port:           "{{ database_port }}"
+    username:       "postgres"
+    maintenance_db: "postgres"
+    password:       "{{ applications.postgres.credentials.postgres_password }}"
+
+# Here you can add more databases 

roles/web-app-pgadmin/vars/main.yml

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+application_id:               "pgadmin"
+database_type:                "postgres"
+database_host:                "{{ 'central-' + database_type if applications | is_feature_enabled('central_database',application_id) }}"
+pgadmin_user:                 5050
+pgadmin_group:                "{{pgadmin_user}}"