Change order of installation

Dockerfile

@@ -25,7 +25,6 @@ RUN apk update && \
     ln -s /lib/libgcc_s.so.1 /usr/glibc-compat/lib/ && \
     \
     ln -s /usr/bin/php7 /usr/local/bin/php && \
-    composer global require "hirak/prestissimo:^0.3" && \
     \
     wget -q https://github.com/docker/compose/releases/download/${compose_version}/docker-compose-`uname -s`-`uname -m` -O /usr/local/bin/docker-compose && \
     chmod +x /usr/local/bin/docker-compose && \
@@ -39,4 +38,6 @@ RUN apk update && \
     git checkout $(git describe --tags $(git rev-list --tags --max-count=1)) && \
     make install && \
     cd .. && \
-    rm -rf git-extras
+    rm -rf git-extras && \
+    \
+    composer global require "hirak/prestissimo:^0.3"