Create initial project structure: Dockerfiles, docker-compose stack, and env config

[Copilot]

Bootstraps the repo with the directory layout and files needed to run a full fmsg stack via Docker Compose.

New files

• docker/fmsgd/Dockerfile — two-stage build: clones markmnl/fmsgd, compiles with golang:1.25, copies binary into a debian:bookworm-slim runtime image; runs as non-root fmsg user on port 4930
• docker/fmsgid/Dockerfile — two-stage build: clones markmnl/fmsgid, compiles with golang:1.18, copies binary into a debian:bookworm-slim runtime image; runs as non-root fmsg user on port 8080
• docker/fmsg-webapi/Dockerfile — two-stage build: clones markmnl/fmsg-webapi, compiles with golang:1.25, copies binary into a debian:bookworm-slim runtime image; runs as non-root fmsg user on port 8081
• compose/docker-compose.yml — four services with correct startup ordering:
  • postgres:18-alpine with health check
  • fmsgid — built from local Dockerfile, waits for postgres healthy
  • fmsgd — built from local Dockerfile, waits for postgres healthy + fmsgid started
  • fmsg-webapi — built from local Dockerfile, depends on fmsgd + fmsgid
• compose/.env — all required env vars with defaults (FMSG_DOMAIN, FMSG_PORT, FMSGID_PORT, GIN_MODE, PG*)

Modified files

• .gitignore — added !compose/.env negation so the compose env file is tracked while root-level .env files remain ignored
• README.md — added structure diagram and quick-start steps

Original prompt

create structure:

fmsg-docker/
├── docker/
│ └── fmsgd/
│ └── Dockerfile
│
├── compose/
│ ├── docker-compose.yml
│ └── .env
│
└── README.md

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[markmnl]

Add docker/ fmsgid and docker/fmsg-webapi dirs with respective Dockerfile
Use postgresql 18

[Copilot]

Add docker/ fmsgid and docker/fmsg-webapi dirs with respective Dockerfile
Use postgresql 18

Done in ea44f0f:

• Added docker/fmsgid/Dockerfile (Go 1.18, clones markmnl/fmsgid, non-root runtime, exposes 8080)
• Added docker/fmsg-webapi/Dockerfile (Go 1.25, clones markmnl/fmsg-webapi, non-root runtime, exposes 8081)
• Bumped postgres to 18-alpine in docker-compose.yml; both fmsgid and fmsg-webapi services now build from their local Dockerfiles instead of pulling GHCR images.