fix: use nobbe/ignis:latest image; fix BASIC_AUTH_USERS $ escaping

- Switch from build:. to image: nobbe/ignis:latest — the Dockerfile
  lives at apps/ignis-server/, not the repo root, so the build was
  failing with "no such file or directory". Using the official image
  is simpler and avoids a lengthy source build on every deploy.

- Document that BASIC_AUTH_USERS must use $$ for every $ in the bcrypt
  hash, so Docker Compose doesn't expand $2y$05$... as variable refs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.dokploy.yml

@@ -0,0 +1,71 @@
+# =============================================================================
+# obsidian-notes : Ignis (real Obsidian, in the browser)
+# Lives at the ROOT of your manohar/ignis Forgejo mirror as a SEPARATE compose
+# file, so upstream's own docker-compose.yml stays untouched and pull-able.
+# In Dokploy: Compose app -> repo manohar/ignis -> Compose Path: docker-compose.dokploy.yml
+# Public endpoint: https://notes.manohargupta.com  (Traefik basicAuth gate)
+# =============================================================================
+services:
+  ignis:
+    # Official image from Docker Hub. Dockerfile lives at apps/ignis-server/ in
+    # the source repo but there's no reason to build — nobbe/ignis:latest is the
+    # canonical published image and avoids a long source build on every deploy.
+    image: nobbe/ignis:latest
+    container_name: obsidian-ignis
+    restart: unless-stopped
+
+    environment:
+      - PORT=8080
+      # Pin the Obsidian version Ignis downloads. Bump deliberately, since a new
+      # Obsidian can outrun the shim. Keep in sync with what you run on the Mac.
+      - OBSIDIAN_VERSION=1.12.4
+      - PUID=1000
+      - PGID=1000
+
+    volumes:
+      # BIND mount (not a named volume) so the host backup cron can git-commit
+      # the plain-markdown vault directly. Each subdir here = one Obsidian vault.
+      - /opt/obsidian/vaults:/vaults
+      # Ignis internal state (plugin mgmt, sync state, auth tokens).
+      - /opt/obsidian/data:/app/data
+      # Cached Obsidian assets — persisted so redeploys don't re-download.
+      - obsidian-app:/app/obsidian-app
+
+    # Rendering happens in YOUR browser, so the server side is light. Cap anyway.
+    mem_limit: 512m
+
+    networks:
+      - dokploy-network
+
+    labels:
+      - traefik.enable=true
+      # --- HTTP router on :80. Gated by the SAME basicAuth as belt-and-suspenders
+      #     so port 80 never serves the vault unauthenticated (in case there's no
+      #     global 80->443 redirect). Also serves the ACME challenge. ---
+      - traefik.http.routers.obsidian-notes-http.rule=Host(`notes.manohargupta.com`)
+      - traefik.http.routers.obsidian-notes-http.entrypoints=web
+      - traefik.http.routers.obsidian-notes-http.middlewares=obsidian-auth
+      # --- HTTPS router on :443, WITH basicAuth ---
+      - traefik.http.routers.obsidian-notes.rule=Host(`notes.manohargupta.com`)
+      - traefik.http.routers.obsidian-notes.entrypoints=websecure
+      - traefik.http.routers.obsidian-notes.tls=true
+      - traefik.http.routers.obsidian-notes.tls.certresolver=letsencrypt
+      - traefik.http.routers.obsidian-notes.middlewares=obsidian-auth
+      # --- basicAuth middleware. The user:bcrypt hash is injected from Dokploy's
+      #     Environment tab (key BASIC_AUTH_USERS) so it never lands in git.
+      #     IMPORTANT: bcrypt hashes contain $ signs. In the Dokploy env tab you
+      #     MUST double every $ so compose doesn't try to expand them as variables:
+      #       htpasswd -nbB manohar 'YOUR_PASSWORD'
+      #     Take the output e.g. manohar:$2y$05$abc... and replace every $ with $$:
+      #       BASIC_AUTH_USERS=manohar:$$2y$$05$$abc...
+      - traefik.http.middlewares.obsidian-auth.basicauth.users=${BASIC_AUTH_USERS}
+      # --- Service: Ignis listens on 8080 ---
+      - traefik.http.services.obsidian-notes.loadbalancer.server.port=8080
+      - traefik.docker.network=dokploy-network
+
+networks:
+  dokploy-network:
+    external: true
+
+volumes:
+  obsidian-app: