Docker fix and tweak (#1781)

* Fix image building with recent docker version

* Mount media path in docker to prevent data loss

build/docker/Dockerfile.monolith

@@ -14,7 +14,7 @@ RUN go build -trimpath -o bin/ ./cmd/generate-keys
 
 FROM alpine:latest
 
-COPY --from=base /build/bin/* /usr/bin
+COPY --from=base /build/bin/* /usr/bin/
 
 VOLUME /etc/dendrite
 WORKDIR /etc/dendrite

build/docker/Dockerfile.polylith

@@ -14,7 +14,7 @@ RUN go build -trimpath -o bin/ ./cmd/generate-keys
 
 FROM alpine:latest
 
-COPY --from=base /build/bin/* /usr/bin
+COPY --from=base /build/bin/* /usr/bin/
 
 VOLUME /etc/dendrite
 WORKDIR /etc/dendrite

build/docker/docker-compose.monolith.yml

@@ -12,6 +12,7 @@ services:
       - 8448:8448
     volumes:
       - ./config:/etc/dendrite
+      - ./media:/var/dendrite/media
     networks:
       - internal
 

build/docker/docker-compose.polylith.yml

@@ -15,6 +15,7 @@ services:
     command: mediaapi
     volumes:
       - ./config:/etc/dendrite
+      - ./media:/var/dendrite/media
     networks:
       - internal