新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch11/docker-images/gogs/Dockerfile

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+ARG ALPINE_VERSION="3.15"
+
+FROM golang:1.14-alpine3.13 AS builder
+ARG GOGS_VERSION="v0.12.3"
+
+RUN apk --no-cache --no-progress add --virtual \
+    build-deps \
+    build-base \
+    git \
+    linux-pam-dev 
+
+WORKDIR /go/src/github.com/gogs
+RUN git clone https://github.com/gogs/gogs.git && \
+    cd gogs && \
+    git checkout $GOGS_VERSION
+
+WORKDIR /go/src/github.com/gogs/gogs
+RUN go build -tags "sqlite" -o /out/gogs 
+
+FROM alpine:$ALPINE_VERSION AS download-base
+WORKDIR /downloads
+RUN echo "$(apk --print-arch)" > /arch.txt 
+RUN ARCH2= && alpineArch="$(apk --print-arch)" \
+    && case "${alpineArch##*-}" in \
+    x86_64) ARCH2='amd64' ;; \
+    aarch64) ARCH2='arm64' ;; \
+    *) echo "unsupported architecture"; exit 1 ;; \
+    esac && \
+    echo $ARCH2 > /arch2.txt 
+
+# Gogs - adapted from project Dockerfile at github.com/gogs/gogs
+FROM download-base AS gogs
+
+# Install system utils & Gogs runtime dependencies
+RUN wget -O /usr/sbin/gosu "https://github.com/tianon/gosu/releases/download/1.14/gosu-$(cat /arch2.txt)" && \
+    chmod +x /usr/sbin/gosu \
+    && echo http://dl-2.alpinelinux.org/alpine/edge/community/ >> /etc/apk/repositories \
+    && apk --no-cache --no-progress add \
+    bash \
+    ca-certificates \
+    curl \
+    git \
+    linux-pam \
+    openssh \
+    s6 \
+    shadow \
+    socat \
+    tzdata \
+    rsync
+
+ENV GOGS_CUSTOM /data/gogs
+
+COPY --from=builder /go/src/github.com/gogs/gogs/docker/nsswitch.conf /etc/nsswitch.conf
+
+WORKDIR /app/gogs
+COPY --from=builder /go/src/github.com/gogs/gogs/docker ./docker
+COPY --from=builder /go/src/github.com/gogs/gogs/templates ./templates
+COPY --from=builder /go/src/github.com/gogs/gogs/public ./public
+COPY --from=builder /out/gogs .
+
+RUN ./docker/finalize.sh
+
+VOLUME ["/data"]
+EXPOSE 3000
+ENTRYPOINT ["/app/gogs/docker/start.sh"]
+CMD ["/bin/s6-svscan", "/app/gogs/docker/s6/"]
+
+# Customized Gogs build
+FROM gogs
+
+RUN apk add --no-cache jq
+ENV GOGS_CUSTOM=""
+
+COPY app.ini ./custom/conf/app.ini
+COPY gogs-install.txt .
+COPY init.sh .
+
+# this uses the original start script to prep the data folders:
+RUN chmod o+w ./custom/conf/app.ini && \
+    chmod +x init.sh && ./init.sh
+
+# replace with custom start script:
+COPY start.sh ./docker/start.sh
+RUN chmod +x ./docker/start.sh