Drop the compose file and systemd unit for the sync server

The server is a single process, so a compose file that only wrapped one
container added a second way to do the same thing. Docker is now the one
documented path, pointing at a Postgres that lives outside the container.

💘 Generated with Crush

Assisted-by: Crush:kimi-k3

Server/README.md

@@ -30,41 +30,40 @@ in-flight push is not cut off mid-write.
 
 ## Run with Docker
 
-`docker-compose.yml` starts Postgres and the server together:
-
-```bash
-cd Server
-POSTGRES_PASSWORD=$(openssl rand -hex 16) docker compose up -d
-docker compose logs -f server      # request log
-```
-
-Or build the image on its own and point it at an existing Postgres:
+The image is a static binary on `distroless` (non-root, no shell), so its
+`HEALTHCHECK` calls `prompt-sync -healthcheck`, which pings the local
+`/healthz` — no curl needed in the image. That is what `docker ps` reports as
+the container health.
 
 ```bash
 docker build -t prompt-sync Server/
 docker run -d --name prompt-sync -p 8080:8080 \
   -e PROMPT_SYNC_DATABASE_URL="postgres://user:pass@host:5432/prompt_sync?sslmode=disable" \
   prompt-sync
+
+docker logs -f prompt-sync         # request log
 ```
 
-The image is a static binary on `distroless` (non-root, no shell, ~6 MB binary),
-so its `HEALTHCHECK` calls `prompt-sync -healthcheck`, which pings the local
-`/healthz` and exits non-zero on failure — no curl needed in the image. That is
-what `docker ps` reports as the container health.
+Postgres stays outside the container; the server only needs a URL. If Postgres
+runs on the Docker host itself, `host` is `host.docker.internal` on macOS and
+Windows, or the host's LAN address on Linux (`--network host` also works).
 
-## Deploy to a Linux host
+## Deploy to a host
+
+Build for the host's architecture and ship the image, or build it on the host
+itself (a `git clone` plus `docker build` is usually simplest):
 
 ```bash
-# from the repo root, on the Mac
-cd Server
-GOOS=linux GOARCH=arm64 go build -o prompt-sync .    # amd64 for x86 hosts
-scp prompt-sync <host>:/tmp/ && ssh <host> 'sudo mv /tmp/prompt-sync /usr/local/bin/'
+# build on the Mac for a linux/arm64 host, then copy it over
+docker build --platform linux/arm64 -t prompt-sync Server/
+docker save prompt-sync | gzip > prompt-sync.tar.gz
+scp prompt-sync.tar.gz <host>:
+ssh <host> 'gunzip -c prompt-sync.tar.gz | docker load'
 
-# on the host: create the database and role, then
-sudo cp Server/prompt-sync.service /etc/systemd/system/
-sudo systemctl edit --full prompt-sync   # set PROMPT_SYNC_DATABASE_URL
-sudo systemctl enable --now prompt-sync
-journalctl -u prompt-sync -f             # verify it is listening
+ssh <host> 'docker run -d --name prompt-sync --restart unless-stopped \
+  -p 8080:8080 \
+  -e PROMPT_SYNC_DATABASE_URL="postgres://user:pass@db-host:5432/prompt_sync?sslmode=disable" \
+  prompt-sync'
 ```
 
 Put it behind TLS if it is reachable from the internet — the code is the only

Server/docker-compose.yml

@@ -1,37 +0,0 @@
-# Postgres + the sync server. `docker compose up -d` is the whole deploy:
-#
-#   POSTGRES_PASSWORD=$(openssl rand -hex 16) docker compose up -d
-#
-# Then point the app at http://<host>:8080. The data lives in the named volume,
-# so `docker compose down` keeps it and `down -v` wipes it.
-
-services:
-  db:
-    image: postgres:18-alpine
-    environment:
-      POSTGRES_DB: prompt_sync
-      POSTGRES_USER: prompt
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD}
-    volumes:
-      - prompt-db:/var/lib/postgresql/data
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U prompt -d prompt_sync"]
-      interval: 5s
-      timeout: 5s
-      retries: 10
-    restart: unless-stopped
-
-  server:
-    build: .
-    environment:
-      PROMPT_SYNC_ADDR: ":8080"
-      PROMPT_SYNC_DATABASE_URL: postgres://prompt:${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD}@db:5432/prompt_sync?sslmode=disable
-    ports:
-      - "8080:8080"
-    depends_on:
-      db:
-        condition: service_healthy
-    restart: unless-stopped
-
-volumes:
-  prompt-db:

Server/prompt-sync.service

@@ -1,22 +0,0 @@
-[Unit]
-Description=Prompt sync server
-Documentation=https://gitea.tzgyn.dev/TZGyn/prompt
-After=network-online.target postgresql.service
-Wants=network-online.target
-
-[Service]
-# The binary is built on a Mac with:
-#   GOOS=linux GOARCH=arm64 go build -o prompt-sync .
-ExecStart=/usr/local/bin/prompt-sync
-Environment=PROMPT_SYNC_ADDR=:8080
-Environment=PROMPT_SYNC_DATABASE_URL=postgres://prompt:CHANGE_ME@localhost:5432/prompt_sync?sslmode=disable
-Restart=on-failure
-RestartSec=2
-# The server only needs to talk to Postgres and bind :8080.
-NoNewPrivileges=true
-PrivateTmp=true
-ProtectSystem=strict
-ProtectHome=true
-
-[Install]
-WantedBy=multi-user.target