Develop (#3)

* Update command added
* Ensure that the upgraded version is really greater
* Update command should not update prerelease
* Minor presentation changes
* Fix command generation in containers from docker-compose file
- Refactored service creation
* Place the full command to the "cmd" package
* Update cobra to v1.4.0
* Updated build and release creation
* Created an install script
* Add more doc
* Add some tests...
* Add a test directive in Makefile

install.sh

@@ -0,0 +1,58 @@
+#!/bin/sh
+
+# Install the latest version of the Katenary detecting the right OS and architecture.
+# Can be launched with the following command:
+# sh <(curl -sSL https://raw.githubusercontent.com/metal3d/katenary/master/install.sh)
+
+set -e
+
+# Detect the OS and architecture
+OS=$(uname)
+ARCH=$(uname -m)
+
+# Detect where to install the binary, local path is the prefered method
+INSTALL_TYPE=$(echo $PATH | grep "$HOME/.local/bin" 2>&1 >/dev/null && echo "local" || echo "global")
+
+# Where to download the binary
+BASE="https://github.com/metal3d/katenary/releases/latest/download/"
+
+
+if [ $ARCH = "x86_64" ]; then
+    ARCH="amd64"
+fi
+
+BIN_URL="$BASE/katenary-$OS-$ARCH"
+
+INSTALL_TYPE="global"
+if [ "$INSTALL_TYPE" = "local" ]; then
+    echo "Installing to local directory, installing in $HOME/.local/bin"
+    BIN_PATH="$HOME/.local/bin"
+else
+    echo "Installing to global directory, installing in /usr/local/bin - we need to use sudo..."
+    answer=""
+    while [ "$answer" != "y" ] && [ "$answer" != "n" ]; do
+        echo -n "Are you OK? [y/N] "
+        read answer
+        # lower case answer
+        answer=$(echo $answer | tr '[:upper:]' '[:lower:]')
+        if [ "$answer" == "n" ] || [ -z "$answer" ]; then
+            echo "--> To install locally, please ensure that \$HOME/.local/bin is in your PATH"
+            echo "Cancelling installation"
+            exit 0
+        fi
+    done
+    BIN_PATH="/usr/local/bin"
+fi
+
+echo
+echo "Downloading $BIN_URL"
+USE_SUDO=$([ "$INSTALL_TYPE" = "local" ] && echo "" || echo "sudo")
+
+T=$(mktemp -u)
+$USE_SUDO curl -SL -# $BIN_URL -o $T || (echo "Failed to download katenary" && rm -f $T && exit 1)
+
+$USE_SUDO mv $T $BIN_PATH/katenary
+$USE_SUDO chmod +x $BIN_PATH/katenary
+echo
+echo "Installed to $BIN_PATH/katenary"
+echo "Installation complete! Run 'katenary --help' to get started."