diff --git a/Dockerfile b/Dockerfile
index 7b33fa4..94e4064 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,19 @@
 FROM node:18-alpine
 
-RUN mkdir -p /usr/src/app && \
-    chown -R node:node /usr/src/app
-
-USER node
+RUN mkdir -p /usr/src/app
 
 WORKDIR /usr/src/app
 
-COPY --chown=node:node package.json /usr/src/app
-COPY --chown=node:node package-lock.json /usr/src/app
-COPY . /usr/src/app
+COPY package.json /usr/src/app
+COPY package-lock.json /usr/src/app
+
+# Change ownership of files before running npm install
+RUN chown -R node:node /usr/src/app
+
+USER node
 
 RUN npm install
 
+COPY . /usr/src/app
+
 CMD ["node", "src/index.js"]
diff --git a/build/Jenkinsfile b/build/Jenkinsfile
index 23022cf..0150d60 100644
--- a/build/Jenkinsfile
+++ b/build/Jenkinsfile
@@ -47,7 +47,10 @@ node('docker') {
             usernamePassword(credentialsId: params.CREDENTIALS_ID, usernameVariable: 'REGISTRY_USERNAME', passwordVariable: 'REGISTRY_PASSWORD')
         ]) {
             env.REGISTRY = params.REGISTRY
-            sh 'pushd pushgateway-pruner && ./build/build-release.sh ' + params.RELEASE_TAG + ' ' + params.IMAGE_NAME + ' && popd'
+            sh """
+                cd pushgateway-pruner
+                ./build/build-release.sh ${params.RELEASE_TAG} ${params.IMAGE_NAME}
+            """
         }
     }
 }
diff --git a/package-lock.json b/package-lock.json
old mode 100644
new mode 100755
index 828914f..0bf3f4f
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "pushgateway-pruner",
-  "version": "0.1.2",
+  "version": "0.2.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "pushgateway-pruner",
-      "version": "0.1.2",
+      "version": "0.2.1",
       "license": "Apache-2.0",
       "dependencies": {
         "axios": "1.7.7",
diff --git a/package.json b/package.json
old mode 100644
new mode 100755
index 52834ad..0be14f6
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pushgateway-pruner",
-  "version": "0.1.2",
+  "version": "0.2.1",
   "description": "Daemon which regularly queries a Prometheus Pushgateway and prunes groupings which have not been pushed for a certain amount of time.",
   "main": "index.js",
   "repository": {