Add alpine 3.11 images

Closes #55

Author: sfackler

.travis.yml

@@ -8,6 +8,7 @@ env:
   - VERSION=1.40.0 VARIANT=buster
   - VERSION=1.40.0 VARIANT=buster/slim
   - VERSION=1.40.0 VARIANT=alpine3.10
+  - VERSION=1.40.0 VARIANT=alpine3.11
 #VERSIONS
 
 install:

1.40.0/alpine3.11/Dockerfile

@@ -0,0 +1,22 @@
+FROM alpine:3.11
+
+RUN apk add --no-cache \
+        ca-certificates \
+        gcc
+
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:$PATH \
+    RUST_VERSION=1.40.0
+
+RUN set -eux; \
+    url="https://static.rust-lang.org/rustup/archive/1.20.2/x86_64-unknown-linux-musl/rustup-init"; \
+    wget "$url"; \
+    echo "44d689d8cf49165f059cafe10a5ce49708a26b0b0641169bc0e39ad9c54930d5 *rustup-init" | sha256sum -c -; \
+    chmod +x rustup-init; \
+    ./rustup-init -y --no-modify-path --profile minimal --default-toolchain $RUST_VERSION; \
+    rm rustup-init; \
+    chmod -R a+w $RUSTUP_HOME $CARGO_HOME; \
+    rustup --version; \
+    cargo --version; \
+    rustc --version;

x.py

@@ -27,6 +27,7 @@
 
 alpine_versions = [
     "3.10",
+    "3.11",
 ]
 
 default_alpine_version = "3.10"