switch to postgres db (#444)

docker-compose.yml

@@ -6,18 +6,15 @@ services:
     restart: on-failure
     ports:
       - "8080:8080"
-  hapi-fhir-mysql:
-    image: mysql:latest
-    container_name: hapi-fhir-mysql
-    #https://dev.mysql.com/doc/refman/8.0/en/identifier-case-sensitivity.html
-    command: --lower_case_table_names=1
+  hapi-fhir-postgres:
+    image: postgres:13-alpine
+    container_name: hapi-fhir-postgres
     restart: always
     environment:
-      MYSQL_DATABASE: 'hapi'
-      MYSQL_USER: 'admin'
-      MYSQL_PASSWORD: 'admin'
-      MYSQL_ROOT_PASSWORD: 'admin'
+      POSTGRES_DB: "hapi"
+      POSTGRES_USER: "admin"
+      POSTGRES_PASSWORD: "admin"
     volumes:
-      - hapi-fhir-mysql:/var/lib/mysql
+      - hapi-fhir-postgres:/var/lib/postgresql/data
 volumes:
-  hapi-fhir-mysql:
+  hapi-fhir-postgres: