Just a single latest image based on Alpine.

Dockerfile

+ARG GOSU_VERSION=1.12
+ARG ALPINE_VERSION=3.12
+FROM alpine:$ALPINE_VERSION as scratch
+ARG GOSU_VERSION
+ENV GOSU_VERSION=$GOSU_VERSION
+RUN set -eux; \
+	\
+	apk add --no-cache --virtual .gosu-deps \
+        ca-certificates \
+		dpkg \
+		gnupg \
+	; \
+	\
+	dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \
+	wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \
+	wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc"; \
+	\
+# verify the signature
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
+	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
+    command -v gpgconf && gpgconf --kill all || :; \
+	\
+	chmod +x /usr/local/bin/gosu; \
+# verify that the binary works
+    gosu --version; \
+	gosu nobody true;
+
+FROM alpine:$ALPINE_VERSION
+ARG GOSU_VERSION
+ENV GOSU_VERSION $GOSU_VERSION
+COPY --from=scratch /usr/local/bin/gosu /usr/local/bin/

README.md

 # Dockerized gosu
 
-> Docker images with gosu installed.
+> Alpine Docker image with gosu installed.
+
+## Usage
+
+The image is based on the latest Alpine image with just `gosu` installed. If you
+wish to use a different image as a base then you can just copy the binary from
+this image so:
+
+```
+FROM adarnimrod/gosu as gosu
+
+FROM alpine:latest
+COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/
+```
 
 ## License