Added Jenkins

Jenkinsfile

@@ -0,0 +1,56 @@
+pipeline {
+    agent none
+    environment {
+        GIT_REPO = 'si0972/ShiteMusicBot'
+        DOCKER_REPO = 'si0972/ci_test_musikkbot'
+        TAG=""
+        FLAKE_FILES = "bot.py cogs/*.py"
+    }
+    stages {
+        stage('Flake8') {
+            agent { label 'amd64'}
+            steps {
+                sh """
+                    python3.7 -m venv venv && venv/bin/pip install flake8 && venv/bin/python -m flake8 --max-line-length 120 ${FLAKE_FILES}
+                    rm -rf venv/
+                """
+                script {
+                    TAG = sh(returnStdout: true, script: 'grep -i bot_version cogs/utils/bot_version.py | cut -d" " -f3 | tr -d \\"').trim()
+                }
+            }
+        }
+        stage('Docker Builds') {
+            parallel {
+                stage('branch') {
+                    agent { label 'amd64'}
+                    when {
+                        not {
+                            changeRequest()
+                        }
+                    }
+                    steps {
+                        script {
+                            if (BRANCH_NAME == 'master') {
+                                def image = docker.build("${DOCKER_REPO}:${TAG}")
+                                image.push()
+                                }
+                                def image = docker.build("${DOCKER_REPO}:$GIT_BRANCH")
+                                image.push()
+                            }
+                        }
+                    }
+                stage('pr') {
+                    agent { label 'amd64'}
+                    when {
+                        changeRequest()
+                    }
+                    steps {
+                        script {
+                            def image = docker.build("${DOCKER_REPO}:PR_$GIT_BRANCH")
+                        }
+                    }
+                }
+            }
+        }
+    }
+}