chore(dlcm-portal): add pom file

add pom file to generate zip file and manage differences between snapshots and releases versions.

assembly/zip-build.xml

+<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.0.0"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.0.0 http://maven.apache.org/xsd/assembly-2.0.0.xsd">
+  <id>deployment</id>
+  <formats>
+    <format>zip</format>
+  </formats>
+  <fileSets>
+    <fileSet>
+      <directory>dist</directory>
+      <outputDirectory>.</outputDirectory>
+      <includes>
+        <include>*</include>
+      </includes>
+    </fileSet>
+  </fileSets>
+</assembly>

pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>ch.dlcm</groupId>
+  <artifactId>dlcm-portal</artifactId>
+  <packaging>pom</packaging>
+  <version>1.4.0-SNAPSHOT</version>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <scm>
+    <connection>scm:git:git@gitlab.unige.ch:DLCM/DLCM-Backend.git</connection>
+    <tag>HEAD</tag>
+  </scm>
+
+  <distributionManagement>
+    <snapshotRepository>
+      <id>nexus_deploy</id>
+      <name>Nexus snapshot repo</name>
+      <url>https://packages.dlcm.ch/repository/angular-snapshots/</url>
+    </snapshotRepository>
+    <repository>
+      <id>nexus_release</id>
+      <name>Nexus release repo</name>
+      <url>https://packages.dlcm.ch/repository/angular-releases/</url>
+    </repository>
+  </distributionManagement>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>exec-maven-plugin</artifactId>
+        <version>1.4.0</version>
+        <executions>
+          <execution>
+            <id>npm install</id>
+            <goals>
+              <goal>exec</goal>
+            </goals>
+            <phase>initialize</phase>
+            <configuration>
+              <executable>npm</executable>
+              <arguments>
+                <argument>install</argument>
+              </arguments>
+            </configuration>
+          </execution>
+          <execution>
+            <id>npm build</id>
+            <goals>
+              <goal>exec</goal>
+            </goals>
+            <phase>package</phase>
+            <configuration>
+              <executable>npm</executable>
+              <arguments>
+                <argument>run</argument>
+                <argument>build</argument>
+              </arguments>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>zip-build</id>
+            <phase>package</phase>
+            <goals>
+              <goal>single</goal>
+            </goals>
+            <configuration>
+              <descriptor>assembly/zip-build.xml</descriptor>
+              <finalName>${project.artifactId}-${project.version}</finalName>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+
+    </plugins>
+  </build>
+
+</project>