Add pgadmin config generator container

pgadmin-config-creator/Dockerfile

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+FROM python:3.8-alpine
+RUN mkdir /app
+RUN mkdir /config
+ADD . /app
+WORKDIR /app
+CMD ["python", "app.py"]

pgadmin-config-creator/app.py

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+import json
+import os
+
+with open('/config/servers.json', 'w') as f:
+    print("created " + f.name)
+    template_string = '{"Servers": {"1": {"Name": "DavinciResolve", "Group": "Servers", "Port": 5432, "Username": "postgres", "Host": "postgres", "SSLMode": "prefer", "MaintenanceDB": "postgres"}}}'
+    data = json.loads(template_string)
+    data["Servers"]["1"]["Username"]=os.getenv("POSTGRES_USER")
+    print(data)
+    json.dump(data, f, indent=2)