added promo image for tech talk feb18

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/promo/images/jakartaee-tech-talk_feb18.png b/promo/images/jakartaee-tech-talk_feb18.png
new file mode 100644
index 0000000..513bd5e
--- /dev/null
+++ b/promo/images/jakartaee-tech-talk_feb18.png
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