Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/public/elite/bower_components/datatables-plugins/i18n/Slovenian.lang

@@ -0,0 +1,30 @@
+/**
+ * Slovenian translation
+ *  @name Slovenian
+ *  @anchor Slovenian
+ *  @author Marko Kroflic, Blaž Brenčič and Andrej Florjančič
+ */
+
+{
+	"sEmptyTable": "Nobenih podatkov ni na voljo",
+	"sInfo": "Prikazujem _START_ do _END_ od _TOTAL_ zapisov",
+	"sInfoEmpty": "Prikazujem 0 do 0 od 0 zapisov",
+	"sInfoFiltered": "(filtrirano od _MAX_ vseh zapisov)",
+	"sInfoPostFix": "",
+	"sInfoThousands": ",",
+	"sLengthMenu": "Prikaži _MENU_ zapisov",
+	"sLoadingRecords": "Nalagam...",
+	"sProcessing": "Obdelujem...",
+	"sSearch": "Išči:",
+	"sZeroRecords": "Nobeden zapis ne ustreza",
+	"oPaginate": {
+		"sFirst": "Prvi",
+		"sLast": "Zadnji",
+		"sNext": "Nasl.",
+		"sPrevious": "Pred."
+	},
+	"oAria": {
+		"sSortAscending": ": vključite za naraščujoči sort",
+		"sSortDescending": ": vključite za padajoči sort"
+	}
+}