server: add Dockerfile and environment variables

The Dockerfile (and docker-compose) simplify the server's deployment.
The environment variables avoid secrets in the code.

docker-compose.yml

@@ -0,0 +1,40 @@
+services:
+  db:
+    image: docker.io/library/mariadb:11.5.2
+    container_name: ${MYSQL_HOST}
+    restart: always
+    ports:
+      - 127.0.0.1:${MYSQL_PORT}:3306
+    environment:
+      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
+      MYSQL_DATABASE: ${MYSQL_DATABASE}
+      MYSQL_USER: ${MYSQL_USER}
+      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
+
+  phpmyadmin:
+    image: docker.io/library/phpmyadmin
+    container_name: fecharts_phpmyadmin
+    links:
+      - ${MYSQL_HOST}
+    restart: unless-stopped
+    ports:
+      - 127.0.0.1:${PHPMYADMIN_PORT}:80
+    environment:
+      - PMA_ARBITRARY=1
+      - PMA_HOST=${MYSQL_HOST}
+      - PMA_PORT=${MYSQL_PORT}
+
+  api:
+    image: odari/fecharts_api:1.0.0
+    container_name: fecharts_api
+    links:
+      - ${MYSQL_HOST}
+    restart: always
+    ports:
+      - 127.0.0.1:${FECHARTS_API_PORT}:80
+    environment:
+      - MYSQL_HOST=${MYSQL_HOST}
+      - MYSQL_USER=${MYSQL_USER}
+      - MYSQL_PASSWORD=${MYSQL_PASSWORD}
+      - MYSQL_DATABASE=${MYSQL_DATABASE}
+      - MYSQL_PORT=${MYSQL_PORT}