Added woodpecker config & Dockerfile

.woodpecker.yml

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+# This is the branch that contains my patches, it's basically the master
+platform: linux/amd64
+branch: master
+
+pipeline:
+  publish:
+    image: woodpeckerci/plugin-docker-buildx
+    secrets: [ docker_username, docker_password ]
+    settings:
+      repo: chewingbever/vlang
+      tag: latest
+      dockerfile: Dockerfile.builder
+      platforms: [ linux/arm/v7, linux/arm64/v8, linux/amd64 ]
+    # The build can run every time, because we should only push when there's
+    # actual changes
+    when:
+      event: push

Dockerfile.builder

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+FROM alpine:3.12
+
+ARG TARGETPLATFORM
+
+WORKDIR /opt/vlang
+
+ENV VVV  /opt/vlang
+ENV PATH /opt/vlang:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ENV VFLAGS -cc gcc
+ENV V_PATH /opt/vlang/v
+
+RUN ln -s /opt/vlang/v /usr/bin/v && \
+  apk --no-cache add \
+    git make gcc curl openssl \
+    musl-dev \
+    openssl-libs-static openssl-dev \
+    zlib-static bzip2-static xz-dev expat-static zstd-static lz4-static \
+    sqlite-static sqlite-dev \
+    libx11-dev glfw-dev freetype-dev \
+    libarchive-static libarchive-dev \
+    gc-dev \
+    diffutils
+
+RUN git clone -b patches https://git.rustybever.be/Chewing_Bever/vieter-v /opt/vlang && \
+  make && \
+  v -version
+
+RUN if [ "$TARGETPLATFORM" = 'linux/amd64' ]; then \
+  wget -O /usr/local/bin/mc https://dl.min.io/client/mc/release/linux-amd64/mc && \
+  chmod +x /usr/local/bin/mc ; \
+fi
+
+CMD ["v"]