fix E: Package 'libpng12-dev' has no installation candidate. (#28)

bestlong · web-flow · commit fcdcd575e102 · 2019-02-20T09:41:28.000+08:00
diff --git a/Dockerfile-56 b/Dockerfile-56
@@ -25,7 +25,7 @@ RUN apt-get update && \
         libz-dev \
         libpq-dev \
         libjpeg-dev \
-        libpng12-dev \
+        libpng-dev \
         libfreetype6-dev \
         libssl-dev \
         libmcrypt-dev
diff --git a/Dockerfile-70 b/Dockerfile-70
@@ -25,7 +25,7 @@ RUN apt-get update && \
         libz-dev \
         libpq-dev \
         libjpeg-dev \
-        libpng12-dev \
+        libpng-dev \
         libfreetype6-dev \
         libssl-dev \
         libmcrypt-dev
diff --git a/Dockerfile-71 b/Dockerfile-71
@@ -25,7 +25,7 @@ RUN apt-get update \
     libz-dev \
     libpq-dev \
     libjpeg-dev \
-    libpng12-dev \
+    libpng-dev \
     libfreetype6-dev \
     libssl-dev \
     libmcrypt-dev \
