standardize apt-get, update formatting

root/etc/cont-init.d/95-apt-get

@@ -0,0 +1,5 @@
+#!/usr/bin/with-contenv bash
+
+if [ -f /usr/bin/apt ]; then
+    apt-get update
+fi

root/etc/cont-init.d/95-tshoot-config

@@ -1,17 +1,16 @@
 #!/usr/bin/with-contenv bash
 
-  ## Ubuntu
-  if [ -f /usr/bin/apt ]; then
-    apt-get update
+## Ubuntu
+if [ -f /usr/bin/apt ]; then
     apt-get install --no-install-recommends -y \
-      dnsutils \
-      net-tools \
-      iputils-ping \
-      traceroute
-  fi
-  # Alpine
-  if [ -f /sbin/apk ]; then
+        dnsutils \
+        net-tools \
+        iputils-ping \
+        traceroute
+fi
+# Alpine
+if [ -f /sbin/apk ]; then
     apk add --no-cache \
-      bind-tools \
-      net-tools
-  fi
+        bind-tools \
+        net-tools
+fi