added bridge dockerfile

Dockerfile.bridge

@@ -0,0 +1,45 @@
+ARG ALPINE_IMAGE=alpine
+ARG ALPINE_VERSION=3.15
+ARG ZT_COMMIT=eac56a2e25bbd27f77505cbd0c21b86abdfbd36b
+ARG ZT_VERSION=1.8.4
+
+FROM ${ALPINE_IMAGE}:${ALPINE_VERSION} as builder
+
+ARG ZT_COMMIT
+
+RUN apk add --update alpine-sdk linux-headers \
+  && git clone --quiet https://github.com/zerotier/ZeroTierOne.git /src \
+  && git -C src reset --quiet --hard ${ZT_COMMIT} \
+  && cd /src \
+  && make -f make-linux.mk
+
+FROM ${ALPINE_IMAGE}:${ALPINE_VERSION}
+
+ARG ZT_VERSION
+
+LABEL org.opencontainers.image.title="zerotier" \
+      org.opencontainers.image.version="${ZT_VERSION}" \
+      org.opencontainers.image.description="ZeroTier One as Docker Image" \
+      org.opencontainers.image.licenses="MIT" \
+      org.opencontainers.image.source="https://github.com/zyclonite/zerotier-docker"
+
+COPY --from=builder /src/zerotier-one /usr/sbin/
+
+RUN apk add --no-cache --purge --clean-protected --update libc6-compat libstdc++ supervisor iptables \
+  && mkdir -p /var/lib/zerotier-one \
+  && mkdir -p /var/log/supervisor \
+  && ln -s /usr/sbin/zerotier-one /usr/sbin/zerotier-idtool \
+  && ln -s /usr/sbin/zerotier-one /usr/sbin/zerotier-cli \
+  && rm -rf /var/cache/apk/*
+
+ENV LOG_PATH=/var/log/supervisor \
+    BRIDGE=false
+
+COPY conf /opt
+COPY scripts /opt
+
+EXPOSE 9993/udp
+
+ENTRYPOINT ["/opt/entrypoint.sh"]
+
+CMD ["-U"]