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Dockerfile

@@ -0,0 +1,34 @@
+# use gradle 7.6, jdk-11 like video on d2l
+FROM gradle:7.6-jdk11 AS builder
+WORKDIR /home/gradle/project
+
+# Copy all project files into the container
+COPY . .
+
+# Update the package lists to fetch the latest versions of available packages
+RUN apt-get update
+
+# installing necessary dependencies
+RUN apt-get install -y python3 python3-pip curl unzip
+#cleaned up so more image layers arent present
+
+# cleaning up the cache to make the imahe as small as possible
+RUN apt-get clean
+
+# clean and build project, avoid the daemon
+RUN gradle clean build --no-daemon --refresh-dependencies
+
+# tomcat base img, jdk 11 use again
+FROM tomcat:9-jre11
+
+# working dir inside tomcat container
+WORKDIR /usr/local/tomcat/webapps
+
+# take out default ROOT app if there is any
+RUN rm -rf ROOT
+
+# copy war file that was built from initial stage to tomcat webapps directory, renamed to ROOT
+COPY --from=builder /home/gradle/project/build/libs/*.war ./ROOT.war
+
+# Expose port 8080 so the application can be accessed from outside the container
+EXPOSE 8080

build.gradle

@@ -15,7 +15,8 @@ plugins {
 
     // gretty is a gradle plugin to make it easy to run a server and hotswap code at runtime.
     // https://plugins.gradle.org/plugin/org.gretty
-    id 'org.gretty' version '3.0.4'
+    id 'org.gretty' version "3.1.5"
+    //had to update gradle version as previous version was outdated
 
     // provides access to a database versioning tool.
     id "org.flywaydb.flyway" version "6.0.8"