Dockerfile to build drone ci with nolimit flag

Dockerfile.drone-nolimit

# Build a container docker build -t drone-nolimit -f Dockerfile.drone-nolimit .
# Replace drone/drone image with drone-nolimit

ARG drone_version=v2.11.1

FROM docker:git AS clone
RUN git clone --recursive https://github.com/drone/drone.git && cd drone && git checkout $drone_version

FROM golang:1.14 AS build
COPY --from=clone /drone /drone
WORKDIR /drone
RUN go build --tags "nolimit" -ldflags "-extldflags \"-static\"" -o release/linux/amd64/drone-server github.com/drone/drone/cmd/drone-server

FROM alpine:3.11 as alpine
RUN apk add -U --no-cache ca-certificates

FROM alpine:3.11
EXPOSE 80 443
VOLUME /data

RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf

ENV GODEBUG netdns=go
ENV XDG_CACHE_HOME /data
ENV DRONE_DATABASE_DRIVER sqlite3
ENV DRONE_DATABASE_DATASOURCE /data/database.sqlite
ENV DRONE_RUNNER_OS=linux
ENV DRONE_RUNNER_ARCH=amd64
ENV DRONE_SERVER_PORT=:80
ENV DRONE_SERVER_HOST=localhost
ENV DRONE_DATADOG_ENABLED=false

COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=build /drone/release/linux/amd64/drone-server /bin/drone-server

ENTRYPOINT ["/bin/drone-server"]