chore: fix depot build (#6057)

scripts/Dockerfile

@@ -0,0 +1,24 @@
+# This is the multi-arch Dockerfile used for Coder. Since it's multi-arch and
+# cross-compiled, it cannot have ANY "RUN" commands. All binaries are built
+# using the go toolchain on the host and then copied into the build context by
+# scripts/build_docker.sh.
+#
+# If you need RUN commands (e.g. to install tools via apk), add them to
+# Dockerfile.base instead, which supports "RUN" commands.
+ARG BASE_IMAGE
+FROM $BASE_IMAGE
+
+# LABEL doesn't add any real layers so it's fine (and easier) to do it here than
+# in the build script.
+ARG CODER_VERSION
+LABEL \
+	org.opencontainers.image.title="Coder" \
+	org.opencontainers.image.description="A tool for provisioning self-hosted development environments with Terraform." \
+	org.opencontainers.image.url="https://github.com/coder/coder" \
+	org.opencontainers.image.source="https://github.com/coder/coder" \
+	org.opencontainers.image.version="$CODER_VERSION"
+
+# The coder binary is injected by scripts/build_docker.sh.
+COPY --chown=1000:1000 --chmod=755 coder /opt/coder
+
+ENTRYPOINT [ "/opt/coder", "server" ]