feat(service): add Obsidian template (#10704)

Co-authored-by: peaklabs-dev <122374094+peaklabs-dev@users.noreply.github.com>

public/svgs/obsidian.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+  <polygon points="50,4 78,22 88,56 68,92 32,92 12,56 22,22" fill="#7C3AED"/>
+  <polygon points="50,4 22,22 32,52 50,38" fill="#9F67FF" opacity="0.7"/>
+  <polygon points="50,4 78,22 68,52 50,38" fill="#4C1D95" opacity="0.6"/>
+  <polygon points="32,52 68,52 68,92 32,92" fill="#5B21B6" opacity="0.5"/>
+  <line x1="50" y1="4" x2="50" y2="38" stroke="#C4B5FD" stroke-width="1.5" opacity="0.8"/>
+</svg>

templates/compose/obsidian.yaml

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+# documentation: https://docs.linuxserver.io/images/docker-obsidian
+# slogan: Note-taking app with linking, organizing, and hundreds of plugins - runs in your browser via remote desktop
+# category: productivity
+# tags: notes,obsidian,markdown,desktop,gui,productivity
+# logo: svgs/obsidian.svg
+# port: 3000
+
+services:
+  obsidian:
+    image: lscr.io/linuxserver/obsidian:latest
+    environment:
+      - SERVICE_URL_OBSIDIAN_3000
+      - PUID=${PUID:-1000}
+      - PGID=${PGID:-1000}
+      - TZ=${TZ:-Etc/UTC}
+      - CUSTOM_USER=${SERVICE_USER_OBSIDIAN}
+      - PASSWORD=${SERVICE_PASSWORD_OBSIDIAN}
+    volumes:
+      - obsidian-config:/config
+    # Required for Electron/Chromium shared memory
+    shm_size: "1gb"
+    # Needed on hosts with older kernels or libseccomp; safe to remove on modern hosts
+    security_opt:
+      - seccomp=unconfined
+    healthcheck:
+      test: ["CMD", "curl", "-s", "-o", "/dev/null", "http://127.0.0.1:3000/"]
+      interval: 5s
+      timeout: 20s
+      retries: 10
+      start_period: 90s