Update .gitpod.Dockerfile

Author: manoelcampos

.gitpod.Dockerfile

@@ -1,4 +1,4 @@
 FROM gitpod/workspace-postgres
 USER gitpod
-RUN ". ~/.sdkman/bin/sdkman-init.sh && sdk install java 17.0.7-amzn && sdk default java 17.0.7-amzn"
-RUN "echo ~/.sdkman/bin/sdkman-init.sh >> ~/.zshrc"
+RUN bash -c ". ~/.sdkman/bin/sdkman-init.sh && sdk install java 17.0.7-amzn && sdk default java 17.0.7-amzn"
+RUN bash -c "echo ~/.sdkman/bin/sdkman-init.sh >> ~/.zshrc"