added docker build script

docker/build.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+set -e
+
+PROJDIR="$(dirname "$(dirname "$(readlink -f "$0")")")"
+cd "$PROJDIR"
+COMMIT="$(git rev-parse HEAD)"
+
+docker buildx build -f docker/Dockerfile \
+    --platform linux/arm64,linux/amd64 \
+    --label "org.opencontainers.image.version=${COMMIT}" \
+    -t "ghcr.io/c3nav/c3nav:${COMMIT}" \
+    --annotation org.opencontainers.image.source="https://github.com/c3nav/c3nav" \
+    --annotation org.opencontainers.image.url="https://c3nav.de" \
+    --annotation org.opencontainers.image.authors="c3nav team" \
+    --annotation org.opencontainers.image.description="Indoor navigation for the Chaos Communication Congress and other events. - Core" \
+    --cache-from "type=registry,ref=ghcr.io/c3nav/c3nav_cache:main" \
+    --cache-to "type=registry,ref=ghcr.io/c3nav/c3nav_cache:main,mode=max" \
+    --push .
+
+docker buildx build -f docker/tileserver.dockerfile \
+    --platform linux/arm64,linux/amd64 \
+    --label "org.opencontainers.image.version=${COMMIT}" \
+    -t "ghcr.io/c3nav/c3nav-tileserver:${COMMIT}" \
+    --annotation org.opencontainers.image.source="https://github.com/c3nav/c3nav" \
+    --annotation org.opencontainers.image.url="https://c3nav.de" \
+    --annotation org.opencontainers.image.authors="c3nav team" \
+    --annotation org.opencontainers.image.description="Indoor navigation for the Chaos Communication Congress and other events. - Tileserver" \
+    --cache-from "type=registry,ref=ghcr.io/c3nav/c3nav_cache:main" \
+    --cache-to "type=registry,ref=ghcr.io/c3nav/c3nav_cache:main,mode=max" \
+    --push .