Add initial Helm chart and Docker Compose setup for Overleaf CEP

docker-compose/docker-compose.yml

@@ -0,0 +1,66 @@
+services:
+    overleaf:
+        restart: always
+        image: overleafcep/sharelatex:5.5.1-ext-v3
+        container_name: overleaf
+        depends_on:
+            mongo:
+                condition: service_healthy
+            redis:
+                condition: service_started
+        ports:
+            - 80:80
+        links:
+            - mongo
+            - redis
+        stop_grace_period: 60s
+        volumes:
+            - ./overleaf/overleaf_data:/var/lib/overleaf
+        environment:
+            OVERLEAF_APP_NAME: Overleaf FSR-IM
+            OVERLEAF_SITE_LANGUAGE: de
+            OVERLEAF_MONGO_URL: mongodb://mongo/overleaf
+            OVERLEAF_REDIS_HOST: redis
+            REDIS_HOST: redis
+            ENABLED_LINKED_FILE_TYPES: 'project_file,project_output_file'
+            ENABLE_CONVERSIONS: 'true'
+            EMAIL_CONFIRMATION_DISABLED: 'true'
+            TEXMFVAR: /var/lib/overleaf/tmp/texmf-var
+            OVERLEAF_SITE_URL: https://overleaf.fsr.imn.htwk-leipzig.de
+            OVERLEAF_NAV_TITLE: Overleaf FSR-IM
+            OVERLEAF_ADMIN_EMAIL: fsrim@htwk-leipzig.de
+            OVERLEAF_LEFT_FOOTER: '[{"text": "© Overleaf 2025 Powered by FSR-IM"} ]'
+            OVERLEAF_RIGHT_FOOTER: '[{"text": "<a href=\"https://gitlab.dit.htwk-leipzig.de/fsr-im\">Gitlab</a>"} ]'
+    redis:
+        restart: always
+        image: redis:6.2
+        container_name: redis
+        expose:
+            - 6379
+        volumes:
+            - ./overleaf/redis_data:/data
+
+    mongo:
+      image: mongo:7.0
+      container_name: mongo
+      hostname: mongo
+      command: '--replSet overleaf'
+      environment:
+        MONGO_INITDB_DATABASE: overleaf
+      volumes:
+        - ./mongodb-init.js:/docker-entrypoint-initdb.d/mongo-init.js:ro
+        - mongodb-data:/data/db/
+      ports:
+        - "27017:27017"
+      extra_hosts:
+        - mongo:127.0.0.1
+      healthcheck:
+          test: echo 'db.stats().ok' | mongosh localhost:27017/test --quiet
+          interval: 10s
+          timeout: 10s
+          retries: 5
+
+volumes:
+  mongodb-data:
+    driver: local
+    name: mongo-data