Add dockerize snippets for dockerfile-mode

Author: sei40kr

dockerfile-mode/dockerize-alpine

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+# -*- mode: snippet -*-
+# name: Seong Yong-ju
+# key: dockerize-alpine
+# expand-env: ((yas-indent-line 'fixed))
+# --
+RUN apk add --no-cache openssl
+
+ENV DOCKERIZE_VERSION ${1:v0.6.1}
+RUN wget https://github.com/jwilder/dockerize/releases/download/${DOCKERIZE_VERSION}/dockerize-alpine-linux-amd64-${DOCKERIZE_VERSION}.tar.gz \
+    && tar -C /usr/local/bin -xzvf dockerize-alpine-linux-amd64-${DOCKERIZE_VERSION}.tar.gz \
+    && rm dockerize-alpine-linux-amd64-${DOCKERIZE_VERSION}.tar.gz
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dockerfile-mode/dockerize-ubuntu

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+# -*- mode: snippet -*-
+# name: Seong Yong-ju
+# key: dockerize-ubuntu
+# expand-env: ((yas-indent-line 'fixed))
+# --
+RUN apt-get update && apt-get install -y wget
+
+ENV DOCKERIZE_VERSION ${1:v0.6.1}
+RUN wget https://github.com/jwilder/dockerize/releases/download/${DOCKERIZE_VERSION}/dockerize-linux-amd64-${DOCKERIZE_VERSION}.tar.gz \
+    && tar -C /usr/local/bin -xzvf dockerize-linux-amd64-${DOCKERIZE_VERSION}.tar.gz \
+    && rm dockerize-linux-amd64-${DOCKERIZE_VERSION}.tar.gz
+$0