Add non-root user to Dockerfiles

Add the mango user and specify in Dockerfiles.

Author: crainte

Dockerfile

@@ -8,8 +8,12 @@ RUN make static || make static
 
 FROM library/alpine
 
-WORKDIR /
+WORKDIR /app
+
+RUN adduser -D --home /app -u 1000 mango
 
 COPY --from=builder /Mango/mango /usr/local/bin/mango
 
+USER 1000:1000
+
 CMD ["/usr/local/bin/mango"]

Dockerfile.arm32v7

@@ -11,5 +11,10 @@ COPY mango-arm32v7.o .
 
 RUN cc 'mango-arm32v7.o' -o '/usr/local/bin/mango' -rdynamic -lxml2 -L/image_size.cr/ext/libwebp -lwebp -L/image_size.cr/ext/stbi -lstbi /myhtml/src/ext/modest-c/lib/libmodest_static.a -L/duktape.cr/src/.build/lib -L/duktape.cr/src/.build/include -lduktape -lm `pkg-config libarchive --libs` -lz `command -v pkg-config > /dev/null && pkg-config --libs --silence-errors libssl || printf %s '-lssl -lcrypto'` `command -v pkg-config > /dev/null && pkg-config --libs --silence-errors libcrypto || printf %s '-lcrypto'` -lgmp -lsqlite3 -lyaml -lpcre -lm /usr/lib/arm-linux-gnueabihf/libgc.so -lpthread /crystal/src/ext/libcrystal.a -levent -lrt -ldl -L/usr/bin/../lib/crystal/lib -L/usr/bin/../lib/crystal/lib
 
-CMD ["/usr/local/bin/mango"]
+RUN useradd --home-dir /app -u 1000 mango
+
+WORKDIR /app
 
+USER 1000:1000
+
+CMD ["/usr/local/bin/mango"]

Dockerfile.arm64v8

@@ -11,4 +11,10 @@ COPY mango-arm64v8.o .
 
 RUN cc 'mango-arm64v8.o' -o '/usr/local/bin/mango' -rdynamic -lxml2 -L/image_size.cr/ext/libwebp -lwebp -L/image_size.cr/ext/stbi -lstbi /myhtml/src/ext/modest-c/lib/libmodest_static.a -L/duktape.cr/src/.build/lib -L/duktape.cr/src/.build/include -lduktape -lm `pkg-config libarchive --libs` -lz `command -v pkg-config > /dev/null && pkg-config --libs --silence-errors libssl || printf %s '-lssl -lcrypto'` `command -v pkg-config > /dev/null && pkg-config --libs --silence-errors libcrypto || printf %s '-lcrypto'` -lgmp -lsqlite3 -lyaml -lpcre -lm /usr/lib/aarch64-linux-gnu/libgc.so -lpthread /crystal/src/ext/libcrystal.a -levent -lrt -ldl -L/usr/bin/../lib/crystal/lib -L/usr/bin/../lib/crystal/lib
 
+RUN useradd --home-dir /app -u 1000 mango
+
+WORKDIR /app
+
+USER 1000:1000
+
 CMD ["/usr/local/bin/mango"]